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  <xs:element name="SeriesCWarrantsIssuedMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prso_SeriesCWarrantsIssuedMember"/>
  <xs:element name="SeriesCWarrantsIssuedOneMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prso_SeriesCWarrantsIssuedOneMember"/>
  <xs:element name="SeriesCWarrantsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prso_SeriesCWarrantsMember"/>
  <xs:element name="SeriesDWarrantsIssuedMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prso_SeriesDWarrantsIssuedMember"/>
  <xs:element name="SeriesEWarrantsIssuedMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prso_SeriesEWarrantsIssuedMember"/>
  <xs:element name="SeriesEWarrantsIssuedOneMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prso_SeriesEWarrantsIssuedOneMember"/>
  <xs:element name="ServicesAndOtherMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prso_ServicesAndOtherMember"/>
  <xs:element name="SixtyTwoPointEightOneToFiveNinetyNinePointSixZeroMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prso_SixtyTwoPointEightOneToFiveNinetyNinePointSixZeroMember"/>
  <xs:element name="StockIncentivePlan2019Member" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prso_StockIncentivePlan2019Member"/>
  <xs:element name="TwoZeroTwoThreePurchaseWarrantMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prso_TwoZeroTwoThreePurchaseWarrantMember"/>
  <xs:element name="TwoZeroTwoTwoPurchaseWarrantMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prso_TwoZeroTwoTwoPurchaseWarrantMember"/>
  <xs:element name="UnderwritingAgreementMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prso_UnderwritingAgreementMember"/>
  <xs:element name="UnvestedRestrictedCommonStockUnitsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prso_UnvestedRestrictedCommonStockUnitsMember"/>
  <xs:element name="VendorAMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prso_VendorAMember"/>
  <xs:element name="VendorBMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prso_VendorBMember"/>
  <xs:element name="VendorCMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prso_VendorCMember"/>
  <xs:element name="VendorDMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prso_VendorDMember"/>
  <xs:element name="VendorEMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prso_VendorEMember"/>
  <xs:element name="WarrantsClassifiedAsEquityMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prso_WarrantsClassifiedAsEquityMember"/>
  <xs:element name="WarrantsClassifiedAsLiabilitiesMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prso_WarrantsClassifiedAsLiabilitiesMember"/>
  <xs:element name="WarrantsIssuedJuneTwoThousandTwentyThreeMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prso_WarrantsIssuedJuneTwoThousandTwentyThreeMember"/>
  <xs:element name="WarrantsIssuedNovemberTwoThousandTwentyTwoMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prso_WarrantsIssuedNovemberTwoThousandTwentyTwoMember"/>
  <xs:element name="ZeroPointZeroZeroToFiveNinetyNinePointSixZeroMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prso_ZeroPointZeroZeroToFiveNinetyNinePointSixZeroMember"/>
  <xs:element name="ZeroPointZeroZeroToZeroPointZeroOneMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prso_ZeroPointZeroZeroToZeroPointZeroOneMember"/>
  <xs:element name="mmWaveICsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prso_mmWaveICsMember"/>
  <xs:element name="mmWaveModulesMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prso_mmWaveModulesMember"/>
  <xs:element name="mmWaveOtherProductsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prso_mmWaveOtherProductsMember"/>
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</xs:schema>
